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What’s in a global climate model? The Community Climate System Model (CCSM version 3) that is run with the supercomputer at the National Center for Atmospheric Research incorporates data about all of the natural processes shown in this diagram to simulate Earth’s complex climate system.
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Global Climate Models and the Southeast Pacific

Scientists use very fast supercomputers to run Global Climate Models (GCMs). GCMs are a good tool to use to better understand Earth's climate. We know that climate is not the same everywhere in the world. In some parts of the world it is pretty easy to model the climate. In other places, it is much more tricky to model the climate. It turns out that theSoutheast Pacific, near the west coast of South America, is one of those tricky places!

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